fix: changing piece on the kings square with chess.put() (#426)

* fix: changing piece on the kings square with chess.put()
jhlywa · Jul 21, 2023 · 6ff1821 · 6ff1821
1 parent 2dcfad2
commit 6ff1821
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/chess.ts b/src/chess.ts
@@ -806,6 +806,13 @@ export class Chess {
       return false
     }
 
+    const currentPieceOnSquare = this._board[sq]
+
+    // if one of the kings will be replaced by the piece from args, set the `_kings` respective entry to `EMPTY`
+    if (currentPieceOnSquare && currentPieceOnSquare.type === KING) {
+      this._kings[currentPieceOnSquare.color] = EMPTY
+    }
+
     this._board[sq] = { type: type as PieceSymbol, color: color as Color }
 
     if (type === KING) {